<p>The red dots represent the number of NICs observed in the field along the studied year. The grey dots represent the median number of NICs as predicted by generating infections according to the SIS epidemic model based on <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1004151#pcbi.1004151.e002" target="_blank">Eq 2</a> (see text), and the grey bars represent their 95% confidence interval.</p